[binutils-gdb] gdb: copyright: make file header scan a bit more pythonic

[Michael Frysinger <vapier@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=99033a63c7ba0997ef737392eef15337d6783078

commit 99033a63c7ba0997ef737392eef15337d6783078
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Sat Jan 1 13:08:20 2022 -0500

    gdb: copyright: make file header scan a bit more pythonic
    
    Should be functionally the same, but uses more pythonic idioms to get
    fewer lines of code, and to make sure to not leak open file handles.
    
    Approved-By: Simon Marchi <simon.marchi@efficios.com>

Diff:
---
 gdb/copyright.py | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/gdb/copyright.py b/gdb/copyright.py
index 8d623e6f5c7..040fed18708 100755
--- a/gdb/copyright.py
+++ b/gdb/copyright.py
@@ -148,15 +148,12 @@ def may_have_copyright_notice(filename):
     # so just open the file as a byte stream. We only need to search
     # for a pattern that should be the same regardless of encoding,
     # so that should be good enough.
-    fd = open(filename, "rb")
-
-    lineno = 1
-    for line in fd:
-        if b"Copyright" in line:
-            return True
-        lineno += 1
-        if lineno > 50:
-            return False
+    with open(filename, "rb") as fd:
+        for lineno, line in enumerate(fd, start=1):
+            if b"Copyright" in line:
+                return True
+            if lineno > MAX_LINES:
+                break
     return False